Hard-rubber pencil



J. SALZ.

HARD RUBBER PENCIL.

APPLlcnxoN FILED Nov.27.192o.

Patented May 2, 1922.

/IV VEN TOI? JAMES 5A@` By 'huw Na/M A TTIMIEYS ing through this barrel portion.

onTTaa sTaTas TaaTanT errance.

JAMES SALZ, 0F NEW YORK, N. Y., ASSIGNOR, BY IVIESNE ASSIGNMENTS, TO PECIL EBODUCTS CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

HARD-RUBBER PENCIL.

Specification of Letters Patent.

Patented May 2, 1222.

Application filed November 27, 1920. Serial No. 426,692.

vented certain new and useful Improvements in Hard-Rubber Pencils, of which the following is a specification.

This invention relates the object is to produce such a pencil that tion, and yet so cheap to `manufacture that is can be sold for a fraction of a dollar. The invention primarily consists in adding a metallic lead propelling mechanism to afnon-metallic composition body and making use of the adhesion between the metal and the composition to hold the parts together. The body being of some easily moldable material, such as hard rubber, so

that the parts which make up the body can be molded or extruded and the propelling mechanism inserted into the body and the body parts assembled with a minimum of labor used in cutting, fitting' and soldering as is the case with metal pencils.

My inventionv is capable of embodiment in many different forms and, while I shall illustrate it by the best embodiment thereof known to me, such embodiment is to'vbe regarded as only typical of many possible embodiments, and my invention is not tobe confined thereto.

Speakingmore particularly, I have devised a central body or barrel portion which is formed with a central opening which may or may not be threaded, and surrounding the central opening are a plurality of lead receiving apertures or ducts extend- Into the central aperture of the barrel portion I by drive fit a metallic lead propellling mechanism which preferably extends beyond the barrel portion at each end. At

the :lower end a tapered closure cap is screwed on to the projecting end of the propelling mechanism to form the writing end' of the pencil, and an erasure bearing closure is forced over the projecting end of the lead propelling mechanism at the top ofthe barrel portion whereby-the parts are `held together.

The embodiment herein described is illusto mechanicalmagazine pencils of the thin lead type and f trated in the accompanying drawings, in which- A n Figure 1 is a plan view or elevation of my improved pencil, l

Figure 2 is a sectional view taken alon the central line of the pencil,

Figure 3 is a sectional view of the molded barrel portion,

Figure 4; is a transverse sectional view taken along the lines 4 4 of Figure 2,

Figure 5 an elevation of the lead propelling mechanism,

Figure 6-'is side View of the lead propelling mechanism, and lFigure 7 is'an elevation of the lead propellingplungenwith its head in place.

Fig. 8' shows a modified form ot construction.

In the drawings, the numeral 11 repre- Sents the formed barrel portion, preferably niade from material such as hard rubber, but lv'vhich may be made of other moldable materia-ls. This barrel portion has a central aperture 12 extending therethrough whichv may -or may not be internally threaded at 13. It is desirable to have the thread stop at 14, leaving the shoulder. Surrounding the central aperture 12 lie lead receiving ducts 15 extending the 'entire length of the barrel portion. 16 and 17 represent the upper and lower ends of the barrel porto use rubber threads (13 in Fig. 2) there can be substituted therefor, metal Ythreads (13 in Fig. 8).

The lead propelling mechanism includes a metallic sleeve 2O having side slots 21 and 22 and a fiange 23 at its lower extremity. Slidably held within the sleeve 20 is a lead propelling plunger 24 adapted to have secured thereto a flathead 25 provided with teeth 26 thereon, adapted to mesh with the threads 13 inthe barrel portion 11.

Encircling vthe lead propelling plunger 24 andforced into the unthreaded end 12 of the barrel portion ll'is a nozzle memberhaving yan enlarged threaded portion- 26 and :a

`33 represents an eraser frictiona-lly held in a cavity 34: in the end member 32. rll`he lead propelling mechanism extends into an aperture in the closure 32 so that the eraser 33' has not only the function of an eraser but rcloses that aperture. llt is noted that the en ds of the closure members 32 and 28 are convexed to be complementary with the concavities of the barrel portion 11. Near each w end of the body or barrel portion, l provide on the periphery of the pencil, a plurality of, or a set of ribs 35 and 36 extending in a direction transversely of the pencil. rll`hese ribs are preferably undulating and preferably do not extend beyond the maximum periphery of the pencil. These grip devices or ribs are to render more easy the gripping of the pencil, and therefore, l especially place one set of these ribs (35) adjacent tto the joint between the cap or tip 28 and the barrel 11, or where the writerfs lingers are most likely to come and whereby the writer may more lirmly press the pencil against the paper. This also prevents any undueTlongitudinal movement of the pencil within' the writers hand and at the same time renders more easy the gripping of the writing tip to rotate it or unscrew it from the pencil.l 'llhe other set of ribsl (36) is placed adjacent to the closure member 32 and is to render more easy the gripping of the closure member to rotate fit to operate the lead .propelling mechanism.

lln operation the lead propelling mechavnism 2() is inserted into the barrel portion 11 Vfrom the bottom,'and rotated until the top thereof projects from the barrel portion f and the Hange 23 seats itself against the threads 13 at 1d. '.lhe closure end 32 is then irremovably forced on to the projecting end ofthe propelling mechanism, whereupon the body portion, the closure cap or tip, and the propelling mechanism are all securely held or embedded in place. Next, the nozzle member 27 vis screwed or forced into the lower part of the central aperture 12 of the barrel member 11 until it takes the position shown in Figure l2. rlFhe leads 31 are then retrata .places vsignature to this specication;

placed in the magazine apertures of ducts 15 and one lead is 'placed in the propelling mechanism. 'llhen the writing end 28 which is equipped with screw threads 35n is screwed into place -upon the threaded enlargement 26 of the nozzle member. Rotation of the end 32 expels the lead 31,- as required, but when it wears out the tip 28 is removed, one ofthe leads in the magazine 15 removed therefrom and inserted in the propelling mechanism, the tip 28 then being screwed in ll am aware that non-metallic bodies have been used for pencils, namelyk woodl and ivory, combined with metal lead-propelling, means, but l have aimed to obtain by a drive-lit an adhering, gripping, cleaving, or t clinging quality between the metal and the, body not possible with ivory where a smooth fr surface is presented nor with wood which is liable to split andmoreover offers nogripping or clinging action. l have found however, after long experimentation that by availing myself of the affinity between rubber andmetal in making either or all of the body, cap and tip of my pencil'of rubber, ll obtain not only a tight tit between th/e metal parts and the rubber but a gripping, adhering or clinging action peculiar to rubber and its equivalent compositions such as bakelite or redmanol, which assures an immovable lrelation between the composition and the metal parts ,without additional securing means. rlhat is, mere frictional contact between the parts is not sutieient-adhesion being necessary.

What l". claim is:

1. A. pencil having a rubber body, and a metalliclead propelling means supported in said body by a drive-fit and the clinging quality of the rubber for the metal.-

2. A. pencil having arbody, metallic lead propelling means, and Ya composition `closure for said body attached to the propelling means by drive-lit and the clinging qualityi 3. A pencil having a body, metallic lead propelling means, a composition tapered writingA tip for said body, and a metallic reinforcement for said tip attached to said tip .by drive-lit and the clinging quality of the composition for the metal, said reinforcement preventing chipping of the material/of said tip.

4. A. pencil having a molded composition body lhaving molded-therein, a plurality of spaced reserve lead compartments. Y Y

ln testimony whereof ll have aed my of the composition for the metal.

. armes sata.' 

